著者
加藤 秀起 古賀 佑彦 向山 隆史 戸松 弘孝 鈴木 友輔 鈴木 昇一
出版者
日本保健物理学会
雑誌
保健物理 (ISSN:03676110)
巻号頁・発行日
vol.44, no.4, pp.380-386, 2009 (Released:2011-01-12)
参考文献数
7

In one of the accidents that might happen in the nuclear power station, there is a contamination accident caused by radioactive corrosion products during a periodic inspection. It is necessary to presume the skin absorbed dose from the adhesion area and the contamination density to forecast the level of the skin hazard by the adhesion of the radioactive substance. However, the data to forecast the local skin dose when the radioactive substance adhered handily is not maintained. In this paper, the absorbed dose in the skin surface neighborhood contaminated by radioactive corrosion products was calculated, and the relation between the adhesion area and the contamination density and the local absorption dose was derived. And, the approximate equation that forecast the integrated dose was derived from these data. As for the absorbed dose rate in depth 70 μm from the skin surface that became the index of the skin hazard, the contribution rate by 59Fe was the highest within 30 days, and the contribution of 60Co rose most after the 30th after the radioactive substance had adhered when the contamination density the adhesion area was the same. The relation between the initial contamination density and days that required it was graphed to reaching to the threshold by the integrated dose when the threshold dose in which the necrosis of the skin was caused was assumed to be 20 Gy. The absorbed dose commitment can be presumed from measurements of the contamination density by using this graph or the approximate equation.
著者
鈴木 昇一 佐久間 拓也 前田 英明
出版者
文教大学
雑誌
情報研究 (ISSN:03893367)
巻号頁・発行日
vol.17, pp.133-170, 1996

多段階認識法で用いられる2つのモデル構成作用素T○、T● が構成されている。認識システムは原パターンφを恰も、T○φ、或いは、T●φかのごとく、錯覚して、φの認識処理をすることが可能になる。 得られたモデル構成作用素は、数理形態学における開化作用素◆◆○、閉示作用素◆◆●に対応するものであり、2値化パターンについては、T○=◆◆○、T●=◆◆●と一致するものである。集合の特性関数を2値化パターンφとみなし、T○、◆◆○、T● 、◆◆●のべキ等性などが独自な方法で証明されている。 Two model-construction operators T○, T● are constructed here, which are needed to design a faculties of multi-stage recognition. A recognition system can extract features from Toφ, T●φ instead of φ and therefore can classify Tφ exactly as though Tφ were φ Two operators T○ and T● obtained here correspond to the opening operator ◆◆○ and the closing operator ◆◆● respectively. We shall show that T○φ=◆◆○φ and T●φ=◆◆●φ hold good for any binary pattern φ. The idempotencies of four operators T○, ◆◆○, T●, ●◆◆ are proved using the fact that a binary pattern is equivalent to the corresponding characteristic function of a set.